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Commit f110ca48 authored by Alex Chiang's avatar Alex Chiang Committed by Jesse Barnes
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PCI Hotplug: schedule fakephp for feature removal 



Now that the PCI core is capable of function-level remove and rescan
as well as bus-level rescan, there's no functional need to keep fakephp
anymore.

We keep it around for userspace compatibility reasons, schedule removal
in three years.

Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent 8ffd2545

Documentation/feature-removal-schedule.txt

+33 −0
Original line number Original line Diff line number Diff line
@@ -335,6 +335,7 @@ Why: In 2.6.18 the Secmark concept was introduced to replace the "compat_net" 
	Secmark, it is time to deprecate the older mechanism and start the

	Secmark, it is time to deprecate the older mechanism and start the

	process of removing the old code.

	process of removing the old code.

Who:	Paul Moore <paul.moore@hp.com>

Who:	Paul Moore <paul.moore@hp.com>



---------------------------

---------------------------





What:	sysfs ui for changing p4-clockmod parameters

What:	sysfs ui for changing p4-clockmod parameters
@@ -344,3 +345,35 @@ Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and 
	Removal is subject to fixing any remaining bugs in ACPI which may

	Removal is subject to fixing any remaining bugs in ACPI which may

	cause the thermal throttling not to happen at the right time.

	cause the thermal throttling not to happen at the right time.

Who:	Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com>

Who:	Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com>



---------------------------



What:	fakephp and associated sysfs files in /sys/bus/pci/slots/

When:	2011

Why:	In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to

	represent a machine's physical PCI slots. The change in semantics

	had userspace implications, as the hotplug core no longer allowed

	drivers to create multiple sysfs files per physical slot (required

	for multi-function devices, e.g.). fakephp was seen as a developer's

	tool only, and its interface changed. Too late, we learned that

	there were some users of the fakephp interface.



	In 2.6.30, the original fakephp interface was restored. At the same

	time, the PCI core gained the ability that fakephp provided, namely

	function-level hot-remove and hot-add.



	Since the PCI core now provides the same functionality, exposed in:



		/sys/bus/pci/rescan

		/sys/bus/pci/devices/.../remove

		/sys/bus/pci/devices/.../rescan



	there is no functional reason to maintain fakephp as well.



	We will keep the existing module so that 'modprobe fakephp' will

	present the old /sys/bus/pci/slots/... interface for compatibility,

	but users are urged to migrate their applications to the API above.



	After a reasonable transition period, we will remove the legacy

	fakephp interface.

Who:	Alex Chiang <achiang@hp.com>